groundless

[ground-lis]

adjective

1. without rational basis.

   groundless fears.

   Synonyms: idle, unjustified, unfounded, baseless

groundless

/ ˈɡraʊndlɪs /

adjective

1. without reason or justification

   his suspicions were groundless

Other Word Forms

• groundlessly adverb
• groundlessness noun

Word History and Origins

Origin of groundless¹

before 900; Middle English: bottomless, unfathomable; Old English grundlēas. See ground ¹, -less

Example Sentences

"But all these claims are groundless and without proof."

From BBC

The corporation, incidentally, said "these continuing attacks on BBC journalism are completely groundless – it is simply false to say that we give any political party any less scrutiny than any other".

From BBC

Lot of reasons for that, it’s not groundless optimism.

From Salon

The Chinese embassy in London called the report "groundless and absurd", adding that China respects freedom of speech in the UK and elsewhere.

From BBC

Israel has rejected her report as "groundless", saying it would "join the dustbin of history".

From BBC

Related Words

• baseless 
• false 
• flimsy 
• gratuitous 
• illogical 
• illusory 
• unfounded 
• unjustified 
• unsupported 
• unwarranted